Technical Data
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Testo 557s – Smart digital manifold with Bluetooth and 4-way valve block
General technical data Weight 1243 g Dimensions 229 x 112.5 x 71 mm (LxWxH) Operating temperature -20 to +50 °C Protection class IP54 Product colour Black Auto-off 10 min* Battery type 4 x type AA batteries Battery life 250 h with no illumination, no Bluetooth®h (without illumination, without Bluetooth®, without vacuum probe); 100 h with illumination and Bluetooth® Radio range 150 m Pressure media CFC Refrigerants in instrument R1234yf; R744 (CO₂); R437A; R503; R452A; R500; R114; R444B; R407H; R422B; R434A; R410A; R290; R449A; R401B; R407F; R13; R123; R718 (H₂O); R404A; R125; R416A; R421B; R422C; R448A; R22; R407A; R409A; R12; R454B; R414B; R442A; R1233zd; R420A; R424A; R458A; R427A; R450A; R124; R502; R1234ze; R600a; R23; R402B; R455A; R454A; R407C; R453a; R513A; R401A; R422D; R402A; R507; R454C; R408A; R421A; R134a; R32; R452B; R438A System requirements requires iOS 7.1 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0 requires iOS 12.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0
Refrigerants update via App R11; FX80; I12A; R1150; R1270; R13B1; R14; R142B; R152A; R161; R170; R227; R236fa; R245fa; R401C; R406A; R407B; R407D; R41; R411A; R412A; R413A; R417A; R417B; R417C; R422A; R426A; R508A; R508B; R600; RIS89; SP22 Storage temperature -20 to +60 °C * when not connected via Bluetooth
Temperature Measuring range -50 to +150 °C Accuracy ±0.5 °C Resolution 0.1 °C Probe connection 2 x Plug-in (NTC) Pressure measurement Measuring range -1 to 60 bar Accuracy ±0.5 % fs Resolution 0.01 bar Probe connection 3 x 7/16″ – UNF + 1 x 5/8” – UNF Overload rel. (high pressure) 65 bar -
Testo 115i – Clamp thermometer operated via smartphone
Temperature – NTC Measuring range -40 to +150 °C Accuracy ±1.3 °C (-20 to +85 °C) Resolution 0.1 °C General technical data Weight 127.4 g Dimensions 183 x 90 x 30 mm Operating temperature -20 to +50 °C Product-/housing material Plastic System requirements requires iOS 13.0 or newer; requires Android 8.0 or newer; requires mobile end device with Bluetooth 4.0 Product colour black/orange Battery type 3 AAA micro batteries Battery life 150 h Data transfer Bluetooth® Radio range 100 m Storage temperature -20 to +60 °C -
Testo 552i – App-controlled wireless vacuum probe
Absolute Pressure Measuring range 0 to 26.66 mbar / 0 to 20000 micron
Accuracy ±10 micron + 10 % of mv (100 to 1000 micron) ±(1
Resolution 1 micron (0 to 1000 micron) / 10 micron (1000 to 2000 micron) /
100 micron (2000 to 5000 micron) /
Overload absolute: 6.0 bar / 87 psi (relative: 5.0 bar / 72 psi)
General technical data Weight 142 g Dimensions 150 x 32 x 31 mm (LxWxH) Operating temperature -10 to +50 °C Protection class IP54 System requirements requires iOS 13.0 or newer; requires Android 8.0 or newer; requires mobile end device with Bluetooth 4.2 Product colour black/orange Auto-off 10 min* Battery type 3 AAA micro batteries Battery life 39 h Connection 7/16“ UNF Interface Bluetooth® 4.2 Storage temperature -20 to +50 °C * when not connected via Bluetooth
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Testo Smart App
General technical data System requirements requires iOS 13.0 or newer; requires Android 8.0 or newer; requires mobile end device with Bluetooth 4.0
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